Jack Cassidy (Patrick Cassidy's son) on The Voice

Here is Jack Gordon Cassidy, son of Patrick Cassidy (brother of David Cassidy) singing "Don't Let the Sun Go Down on Me" on "The Voice."

He has glimmers of grandfather Jack's smile. He doesn't have the vocal range or depth that his uncle David had, but he was never professionally trained, from what I have read.

Video of him singing:

https://www.nbc.com/the-voice/video/jack-cassidy-dont-let-the-sun-go-down-on-me/3503593

Same clip on YouTube:

https://www.youtube.com/watch?v=OiDLvmk0dAo

Found this on NBC; just a short blurb but it doesn't allude to any professional training.

"Jack comes from a family of professional entertainers. His father, Patrick Cassidy, and grandmother, Shirley Jones, are most notable, but his generation was discouraged from performing. At age seven, he joined his dad on tour and belted out songs in the car - to his parents' surprise and delight. He later played piano and during high school participated in mission trips to Uganda and the Dominican Republic, where he played music and sang with children. "

Source:

https://www.nbc.com/the-voice/credits/credit/season-12/jack-cassidy